JSON .NET deserialize string[] instead of string [duplicate]

I have an inconsistent JSON file, that was likely generated by hand. Here's a truncated example:

[
    {
        "Generic Name": "Lurasidone",
        "Brand Name": ["Latuda"]
    }
    {
        "Generic Name": "Lisdexamfetamine",
        "Brand Name": "Vyvanse"
    }
]

Since "Brand Name" is [] for one, and just a regular string for another, how do I take care of this in .NET?

public class Drug
{
    [JsonProperty("Generic Name")]
    public string GenericName {get; set;}

    [JsonProperty("Brand Name")]
    public string[] BrandName {get; set;}
}

List<Drug> a = JsonConvert.DeserializeObject<List<Drug>>(
    File.ReadAllText("d.json"));

Results in the error:

Error converting value "Vyvanse" to type 'System.String[]'. Path '[1].Brand Name', line 20, position 26.